Touch sensing device

• US 9,959,000 B2
• Filed: 08/04/2016
• Issued: 05/01/2018
• Est. Priority Date: 04/15/2009
• Status: Active Grant

• Current Assignee: HannStar Display Corporation
• Original Assignee: Industrial Technology Research Institute
• Inventors: Kung, Chen-Pang, Chen, Yu-Jen, Lin, Chen-Wei
• Primary Examiner(s): Lee, Gene W
• Application Number:
  US15/229,107
• Publication Number:
  US 20160342243A1
• Time in Patent Office: 635 Days
• CPC Class Codes: G06F 2203/04103 Manufacturing, i.e. details related to manufacturing processes specially suited for touch sensitive devices
• CPC Class Codes: G06F 2203/04107 Shielding in digitiser, i.e. guard or shielding arrangements, mostly for capacitive touchscreens, e.g. driven shields, driven grounds
• CPC Class Codes: G06F 2203/04112 Electrode mesh in capacitive digitiser: electrode for touch sensing is formed of a mesh of very fine, normally metallic, interconnected lines that are almost invisible to see. This provides a quite large but transparent electrode surface, without need for ITO or similar transparent conductive material
• CPC Class Codes: G06F 3/042 by opto-electronic means
• CPC Class Codes: G06F 3/0445 using two or more layers of sensing electrodes, e.g. using two layers of electrodes separated by a dielectric layer
• CPC Class Codes: G09G 2300/0426 Layout of electrodes and connections
• CPC Class Codes: G09G 5/00 Control arrangements or circuits for visual indicators common to cathode-ray tube indicators and other visual indicators image data processing or generation, in general G06T

Abstract

A touch sensing device is provided. The device includes a substrate; a plurality of first electrodes formed on the substrate and arranged along a first direction without overlapping one another; a first insulating layer formed on the substrate and covering the plurality of first electrodes; and a plurality of second electrodes formed on the first insulating layer and arranged along a second direction without overlapping one another, wherein the first direction is orthogonal to the second direction.

Claims

1. A touch sensing device, comprising:

a substrate;

a plurality of first electrodes formed on the substrate and arranged along a first direction without overlapping one another;

a first insulating layer formed on the substrate and covering the plurality of first electrodes;

a plurality of second electrodes formed on the first insulating layer and arranged along a second direction without overlapping one another, wherein each of the plurality of second electrodes has a first surface facing away from the first insulating layer and two second surfaces being opposite to each other and connecting the first surface and the first insulating layer;

a protecting layer formed on the first insulating layer and covering the first surface and the second surfaces of each of the plurality of second electrodes; and

an isolating layer directly formed on the substrate and configured to prevent interference from a side of the isolating layer facing away from the substrate, the substrate being between the isolating layer and the first electrodes, the isolating layer comprising;

a second insulating layer formed on the substrate; and

a third electrode layer formed on the second insulating layer,

wherein the first direction is orthogonal to the second direction, and the first electrodes and the second electrodes are configured to sense capacitance variation in response to a conductor indirectly touching the second electrodes,

wherein the touch sensing device further comprises an adhesive layer formed on the side of the isolating layer facing away from the substrate and extending from an edge of the isolating layer to a central portion of the isolating layer, and the adhesive layer is in direct contact with the isolating layer, and

wherein a display device is disposed directly on the adhesive layer of the touch sensing device, the isolating layer is configured to prevent interference from the display device, and the adhesive layer extends from an outer edge of the display device to a central portion of the display device.

2. The touch sensing device as claimed in claim 1, wherein the second insulating layer is disposed between the substrate and the third electrode layer and in direct contact with the substrate and the third electrode layer.

3. The touch sensing device as claimed in claim 1, further comprising the conductor, wherein the first electrodes and the second electrodes are used to sense total capacitance variation according to the conductor indirectly touching the second electrodes.

4. The touch sensing device as claimed in claim 1, wherein the display device comprises a substrate device, a display medium layer, and a bottom device, the adhesive layer bonds the substrate device to the isolating layer, the display medium layer is disposed between the substrate device and the bottom device, and the substrate device is disposed between the display medium layer and the adhesive layer.

5. The touch sensing device as claimed in claim 4, wherein the adhesive layer is in direct contact with the substrate device and the isolating layer.

6. The touch sensing device as claimed in claim 1, wherein the protecting layer is a scrape-proof layer, an anti-reflection layer, a water-proof layer, or a gas-proof layer.